Hi!
I am testing RDS 2019 with RemoteApp, and I have problems with startup splash screens. Each splash screen creates a button on the client’s taskbar and does not disappear from desktop and taskbar after the appearance of the main window. For example, I run three RemoteApp and I have three splash screens and three program windows on my desktop. And even if I close these windows, the splash screens will still remain on desktop and cannot be closed. This happens only in RemoteApp and does not occur with a remote desktop mode. I tried to recreate an RDS farm again, but it does not help.
This does not happen with all programs (having splash screen), but with many. At the same time, there were no such problems at RDS 2012R2/2016.
As RDCB and RDSH used Windows Server 2019 with latest cumulative update (2019-01). As clients used Windows 10 1709/1809 with same update.